Ring binder



FIG. 1 is a perspective view of a ring binder showing our new design from the front, left (or spine) side and top, in a folded (or closed) position;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof, in the unfolded (or open) position; and,

FIG. 6 is a reduced scale top perspective view thereof in the unfolded (or open) position thereof. 

The ornamental design for a ring binder, as shown and described. 